摘要
单一作物系统的植食性昆虫类群数量在全年的大部分时间里比复合系统的荔枝树子系统上的要多， 但比整个复合系统中的要少． 复合系统中的荔枝树上的蜘蛛类群， 寄生与捕食性昆虫类群及腐生及其它昆虫类群的数量在１ 年中的多数时间都多于单一系统， 复合系统相应昆虫的数量更是远远超过单一系统． 单一系统的节肢动物群落， 其优势集中性值在０１ ～０３ 之间波动， 无论害虫还是天敌其优势集中度都比复合系统（００２ ～０１５） 的要高． 复合系统中天敌群落在控制害虫上确实发挥了一定的作用， 复合系统相对于单一系统的简单生境来讲有利于节肢动物群落多样性的维持和发展． 通过在果园增加植物多样性优化荔枝园生态系统， 使昆虫群落多样性增加， 为持续控制害虫提供了一条新途径．
More phytophagous insects were collected from sample litchi trees in simple orchard ecosystem than in complex one in most of the year. But there were more spiders, parasitoids, detrivores and predatory insects found in litchi trees in the complex orchard ecosystem than in the simple ones throughout whole year. The index values or dominant concentration of arthropod community in simple orchard ecosystem (ranged from 0 1 to 0 3) were greater than those in complex ones (varied from 0 02 to 0 15). The results showed that natural enemies did play an important role in suppressing the pest populations in the complex orchard ecosystem. The forage in complex orchard ecosystem might help in conserving, restoring and utilizing insect diversity so as to gain social and ecological benefits as well as economic benefits
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
1999年第S1期126-127,129-130,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
关键词
节肢动物群落
复合生态系统
种群动态
优势集中度
arthropod community
complex ecosystem
population dynamics
dominant concentration degree
